Definition: it is a physiological phase lasting 2 – 5 years during which physical & sexual maturation occurs (adolescence means mental, physical & sexual maturation)
1. Thelarche: breast budding due to estrogen effect.
2. Adrenarche: appearance of pubic then axillary hair due to ↑ACTH & ↑ adrenal androgens.
3. Growth spurt: accelerated growth due to ↑ production of growth hormone.
4. Menarche: 1st menstruation in female life due to estrogen effect.
♦ It is usually the last event, median age of onset in Egypt is 12.7 years
♦ 1st cycles are usually anovulatory.
Theories of initiation of puberty:
♦ Activation of the hypothalamus leads to GnRH production → gonadotrophins production
(FSH& LH) → follicular development & estrogen secretion:
* Development of genital organs.
* Endometrial proliferation & menstruation.
* Appearance of 2ry sexual characters.
* Activation of the hypothalamus is due to:
-↓ Sensitivity of –ve feedback mechanism to small amount of estrogen.
– Suppression central inhibition on GnRH release.
– May be related to ↑ production of growth hormone.
Factors affecting the age of menarche & puberty:
1) Constitutional (main factor).
2) Geographic distribution.
3) Family history.
4) General health & nutrition.
5) Psychological factors.
1. Precocious puberty.
2. Delayed puberty: delayed menarche till age 14 years in absence of 2ry sexual characters & 16 years in presence of 2ry sexual characters.
3. Growth problems during puberty (short stature, tall stature, marked obesity & menstrual disorders e.g. Menorrhagia of puberty).
Puberty in Girls ( Female Puberty )
What are the Stages of Puberty in Girls?
Shilpa explains what your body and emotions go through when you go through puberty. Physical changes can be breasts, periods, growth, wider hips and hormones can make you emotional and introduce sexual feelings. Understand how puberty affects girls.
Puberty Dr. Ashraf Fouda Damietta General Hospital
It is a physiological phase lasting 2 to 5 years, during which the genital organs mature. Manifestations of puberty in the female include 1. Menarche,2. Appearance of secondary sex characters,3. Physical development and 4. Psychological changes.
Puberty: Normal and Abnormal Dr: Elsayed I. Salama Professor of Pediatrics
Objectives: At the end of this lecture participants will be able to know: • The pathophysiology of abnormal pubertal development. • The various medical disorders due to abnormal pubertal development.
Aboubakr Elnashar, Professor Obstetrics and Gynecology
Define Transitional stage from childhood to adulthood manifested by physiological changes & development of SSC